BUG: fix for swig integration issue

We don't have std::unordered_map implemented atm, it's easier to ignore the function

Source/Wrappers/csharp/SwigInterface/ignored.i

@@ -30,6 +30,8 @@
 %ignore imstk::Log;
 %rename("%s") imstk::Logger::startLogger();
 
+%ignore imstk::Scene::getCameras() const;
+
 %ignore imstk::InteractionPair::getTaskNodeInputs();
 %ignore imstk::InteractionPair::getTaskNodeOutputs();
 %ignore imstk::CollisionGraph::getInteractionPairMap();